Make sure we use the top-level ones

ee/app/mailers/ee/preview/notify_preview.rb

@@ -7,54 +7,54 @@ module EE
       # https://github.com/rails/rails/blob/3faf7485623da55215d6d7f3dcb2eed92c59c699/actionmailer/lib/action_mailer/preview.rb#L73
       prepended do
         def add_merge_request_approver_email
-          Notify.add_merge_request_approver_email(user.id, merge_request.id, user.id).message
+          ::Notify.add_merge_request_approver_email(user.id, merge_request.id, user.id).message
         end
 
         def issues_csv_email
-          Notify.issues_csv_email(user, project, '1997,Ford,E350', { truncated: false, rows_expected: 3, rows_written: 3 }).message
+          ::Notify.issues_csv_email(user, project, '1997,Ford,E350', { truncated: false, rows_expected: 3, rows_written: 3 }).message
         end
 
         def approved_merge_request_email
-          Notify.approved_merge_request_email(user.id, merge_request.id, approver.id).message
+          ::Notify.approved_merge_request_email(user.id, merge_request.id, approver.id).message
         end
 
         def unapproved_merge_request_email
-          Notify.unapproved_merge_request_email(user.id, merge_request.id, approver.id).message
+          ::Notify.unapproved_merge_request_email(user.id, merge_request.id, approver.id).message
         end
 
         def mirror_was_hard_failed_email
-          Notify.mirror_was_hard_failed_email(project.id, user.id).message
+          ::Notify.mirror_was_hard_failed_email(project.id, user.id).message
         end
 
         def project_mirror_user_changed_email
-          Notify.project_mirror_user_changed_email(user.id, 'deleted_user_name', project.id).message
+          ::Notify.project_mirror_user_changed_email(user.id, 'deleted_user_name', project.id).message
         end
 
         def send_admin_notification
-          Notify.send_admin_notification(user.id, 'Email subject from admin', 'Email body from admin').message
+          ::Notify.send_admin_notification(user.id, 'Email subject from admin', 'Email body from admin').message
         end
 
         def send_unsubscribed_notification
-          Notify.send_unsubscribed_notification(user.id).message
+          ::Notify.send_unsubscribed_notification(user.id).message
         end
 
         def service_desk_new_note_email
           cleanup do
             note = create_note(noteable_type: 'Issue', noteable_id: issue.id, note: 'Issue note content')
 
-            Notify.service_desk_new_note_email(issue.id, note.id).message
+            ::Notify.service_desk_new_note_email(issue.id, note.id).message
           end
         end
 
         def service_desk_thank_you_email
-          Notify.service_desk_thank_you_email(issue.id).message
+          ::Notify.service_desk_thank_you_email(issue.id).message
         end
       end
 
       private
 
       def approver
-        @user ||= User.first
+        @user ||= ::User.first
       end
     end
   end